EP 0973122 A2 20000119 - Iris Information Acquisition apparatus and iris identification apparatus
Title (en)
Iris Information Acquisition apparatus and iris identification apparatus
Title (de)
Gerät zur Irisdatenerfassung und Irisindentifizierungsgerät
Title (fr)
Appareil d'aquisation d'informations de l'iris et appareil d'identification de l'iris
Publication
Application
Priority
JP 21974398 A 19980717
Abstract (en)
An iris recognition system capable of remarkably reducing time taking from an image pickup of an iris image to generation of an iris code and of simplifying the construction is implemented. A sensor 10 comprises a group of pixels arranged in polar coordinates. An iris image is controlled so that the iris image is correctly formed on the sensor 10, particularly, the center of the iris image matches. The inner and outer diameters of the iris are detected according to the iris image formed on the sensor 10, and the difference between the inner diameter and the outer diameter in the radial direction is detected. The number i of pixels of each ring in the case of division into the predetermined number of concentric ring bands is calculated according to the difference. A weighted mean processing part 13 performs a weighted mean operation according to the number i of pixels. A band-pass filter 15 performs a processing in the tangential and radial directions of feature extraction of the iris image of each ring band and generates the iris code with a binary format formed by a binary circuit 16.
IPC 1-7
IPC 8 full level
A61B 3/10 (2006.01); A61B 5/117 (2006.01); G06K 9/00 (2006.01); G06T 1/00 (2006.01); G06T 7/00 (2006.01); A61B 3/12 (2006.01)
CPC (source: EP US)
G06V 40/18 (2022.01 - EP US); G06V 40/19 (2022.01 - EP US); H04N 23/67 (2023.01 - EP US); H04N 25/702 (2023.01 - EP); A61B 3/1216 (2013.01 - EP US); H04N 25/702 (2023.01 - US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0973122 A2 20000119; EP 0973122 A3 20060419; EP 0973122 B1 20080312; EP 0973122 B8 20080528; DE 69938324 D1 20080424; DE 69938324 T2 20090423; JP 2000036036 A 20000202; JP 3610234 B2 20050112; US 6526160 B1 20030225
DOCDB simple family (application)
EP 99305613 A 19990715; DE 69938324 T 19990715; JP 21974398 A 19980717; US 35014299 A 19990709